Many cards in the deck already help this diversity along
Its a healthy mix of current resale value, the cultural impact each card has had, and a cards visual aesthetics, and also a bit of personal preference from myself as well (so just keep that in mind)
Priced at 10 per card (no minimum card requirements!) with an option to add 'colour match' (the grading label matches the colour scheme of the encased card) for 1 per card, or an ACE Label (the grading label includes unique elements also found on the encased card, examples below) for 3
Knocking out a creatures abilities can often be just the thing you need to pick yourself back up for a turn
They won't change if the permanent with backup loses any abilities before the backup ability resolves
From early tournament data and community discussion: Jessie - Lively Cowgirl (Enchanted, #223) and Woody - Jungle Guide (Legendary, #15) are top picks for Amber toy decks